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Finding the Fourth Proportional to 70.47, 97.00 and 66.83

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Solution

The fourth proportional to 70.47, 97.00 and 66.83 is: 91.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.47 : 97.00 = 66.83 : x
  2. Step 2: Convert to fraction form
    70.47/97.00 = 66.83/x
  3. Step 3: Cross multiply
    70.47x = 97.00 × 66.83
  4. Step 4: Simplify right side
    70.47x = 6,481.86
  5. Step 5: Solve for x
    x = 6,481.86/70.47
  6. Step 6: Final answer
    x = 91.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.